| State or Country | |
| Subsidiary* | of Incorporation |
| Mueller Brass Holding Company, Inc. | Delaware |
| Mueller Brass Co. (Assumed name: Mueller Brass Products) | Michigan |
| Extruded Metals, Inc. (Effective February 27, 2007) | Delaware |
| Mueller Industrial Realty Co. | Michigan |
| Itawamba Industrial Gas Company, Inc. | Mississippi |
| Streamline Copper & Brass Ltd. | Canada |
| Mueller Plastics Holding Company, Inc. | Ohio |
| Mueller Plastics Corporation, Inc. | Delaware |
| MPC Foundry, Inc. | Delaware |
| MPC Machine Shop, Inc. | Delaware |
| Mueller Brass Forging Company, Inc. | Delaware |
| Mueller Copper Tube Company, Inc. | Delaware |
| Mueller Fittings, LLC | Mississippi |
| Mueller Fittings Company, Inc. | Michigan |
| MCTC, LLC | Mississippi |
| Mueller East, Inc. | Delaware |
| Mueller Formed Tube Company, Inc. | Delaware |
| Mueller Impacts Company, Inc. | Delaware |
| Mueller Press Company, Inc. | Mississippi |
| Mueller Refrigeration Products Company, Inc. | Delaware |
| Mueller LBHC, Inc. | Delaware |
| Lincoln Brass Works, Inc. (Assumed name: Mueller Gas Products) | Michigan |
| Overstreet-Hughes, Co., Inc. | Tennessee |
| Mueller Refrigeration LLC | Michigan |
| Mueller Refrigeration Holding Company, Inc. | Delaware |
| Mueller Streamline Co. | Delaware |
| Precision Tube Company, Inc. | Pennsylvania |
| Southland Pipe Nipples Company, Inc. | Texas |
| Mueller Tool and Machine, Inc. | Delaware |
| Mueller Casting Company, Inc. | Delaware |
| Mueller Packaging, LLC | Mississippi |
| Micro Gauge, Inc. | Michigan |
| Microgauge Machining, Inc. | Michigan |
| Propipe Technologies, Inc. (Assumed name: Mueller Gas Products) | Ohio |
| WTC Holding Company | Michigan |
| Muellux Holding Company I SARL | Luxembourg |
| Muellux Holding Company II SARL | Luxembourg |
| Mueller Europe, Limited | United Kingdom |
| Mueller Primaflow Limited | United Kingdom |
| Brasscapri Limited | United Kingdom |
| Primaflow Limited | United Kingdom |
| KX Company Limited | United Kingdom |
| Brassware Sales Limited | United Kingdom |
| Instox Limited | United Kingdom |
| State or Country | |
| Subsidiary* | of Incorporation |
| DENO Investment Company, Inc. | Michigan |
| Mueller de Mexico, S.A. de C.V. (1) | Mexico |
| DENO Holding Company, Inc. | Michigan |
| DENO Acquisition EURL | France |
| Mueller Europe, S.A. (2) | France |
| B & K Industries, Inc. | Illinois |
| Mueller Copper Tube Products, Inc. | Delaware |
| Linesets, Inc. | Delaware |
| Arava Natural Resources Company, Inc. | Delaware |
| United States Fuel Company | Nevada |
| King Coal Company | Utah |
| Canco Oil & Gas Ltd. | Alberta, Canada |
| Aegis Oil and Gas Leasing Ltd. | Alberta, Canada |
| Bayard Mining Corp. | Delaware |
| Washington Mining Company | Maine |
| Amwest Exploration Company | Delaware |
| USSRAM Exploration Company | Maine |
| White Knob Mining Company | Idaho |
| Arava Exploration Company | Colorado |
| Summit Systems, Inc. | Delaware |
| Kennet Company Limited | Bermuda |
| Mining Remedial Recovery Company | Delaware |
| Carpentertown Coal & Coke Company | Pennsylvania |
| U.S.S. Lead Refinery, Inc. | Maine |
| Leon Water Enterprises, Inc. (50%) | Texas |
| Macomber Construction Company | Ohio |
| Macomber, Incorporated | Ohio |
| Macomber Building and Land Corporation | Delaware |
| DENO Investment Company II, Inc. | Michigan |
| MII Financial Corporation | Michigan |
| Mueller Streamline Holding S.L.U. | Spain |
| WTC HoldCo I, LLC | Delaware |
| WTC HoldCo II, LLC | Delaware |
| Mueller Comercial de Mexico S. de R.L. de C.V. (3) | Mexico |
| NICNA Mexico, S. de R.L. de C.V. (4) | Mexico |
| NICNA Mexico Servicios, S. de R.L. de C.V. (4) | Mexico |
| NICNA Mexico Proyectos, S. de R.L. de C.V. (4) | Mexico |
| NICNA Mexico Comercial, S. de R.L. de C.V. (4) | Mexico |
| NICNA Mexico Maquinaria, S. de R.L. de C.V. (4) | Mexico |
| Mueller Streamline II, LLC | Delaware |
| Changzhou Mueller Refrigerant Valve Manufacturing Co., Ltd. | China |
| Mueller Streamline Trading, LLC | Delaware |
| Mueller Streamline China, LLC | Delaware |
| Jiangsu Mueller-Xingrong Copper Industries Limited (5) | China |
| *All subsidiaries are 100% owned, except as shown. | |
| (1) Owned by DENO Investment Company, Inc. (99.8%) and Mueller Streamline Co. (.2%). | |
| (2) On March 3, 2003, Mueller Europe S.A. filed a petition for liquidation with the Commercial Court of Provins Province, France and, on March 4, the Court declared the entity to be in liquidation. Less than 1% owned by non-affiliated individuals. | |
| (3) Owned by Mueller Streamline Holding S.L.U. (1.55%), WTC HoldCo I, LLC ( 91.45% ), and WTC HoldCo II, LLC ( 7% ). | |
| (4) Less than 1% of the outstanding common stock is owned by WTC HoldCo I, LLC. | |
| (5) Owned by Mueller Streamline China, LLC (50.5%). |
